JPS6246723Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a holder for embedded materials used in concrete slabs, and is intended to provide a holder that is extremely easy to construct and exhibits good properties.

In recent years, hollow concrete slabs have been widely adopted for medium-to-high-rise buildings such as apartment complexes, general buildings, and warehouses in order to reduce the weight of the slabs, make them soundproof, and eliminate small beams. In the case of a concrete slab that uses the produced PC plate as the lower layer, combines it with a lightweight solid material as an embedding material, and casts the upper layer of concrete on-site, the advantage of construction is that it saves the labor of pouring the lower layer on-site. On the other hand, it is necessary to transport the heavy PC plate to the construction site, and it also requires lifting work at the site using a loading machine, which requires a large amount of time and economic burden, and the PC plate itself has to be transported. The production was also time consuming. There are also cast-in-place concrete slabs with pipes buried in the concrete.
In this case, since the pipe is made of a thin steel plate, it is easily damaged by being dropped or bumped during transportation and storage, and once the pipe is damaged, water accumulates inside, and the accumulated water is removed after the construction is completed. There is a risk of leakage, and when a worker stands on the pipe for reinforcing work before concrete pouring, the circular shape of the pipe makes the footing unstable, and they must take great care not to dent the pipe. If the pipe were damaged, there was a risk that the structure would be defective after completion, as described above.

Therefore, as an on-site pouring construction method using concrete that can eliminate the drawbacks and inconveniences of the conventional technology, we have developed a concrete casting method in which embedded materials made of lightweight solids are suspended above the concrete pouring formwork at appropriate intervals. A construction method has been developed that is characterized by supporting and holding the concrete with a holder partially fixed on top, pouring concrete with the necessary reinforcement, and surrounding the embedded material with concrete. During the above construction, there is a need for a holder that can reliably and stably support and hold the embedded material so that it can be handled stably as a scaffold, and in view of the above circumstances, this invention provides a holder that can satisfy that need. The structure is a holder that supports and holds the embedded material in a suspended state above the formwork for concrete pouring, and a support that can partially be fixed to the formwork for concrete pouring. The embedding material is sandwiched between the legs, the short side mold piece that can support the short side of the embedding material, and the long side mold piece that can support the long side of the embedding material. The support leg is combined with a holding piece that can hold and prevent the embedding material from floating, and the supporting leg is arranged so that at least the intersecting part of the short side mold piece and the long side mold piece formed in a frame-like combination is held in the middle of the leg. It is characterized by being formed so that it can be supported and held while floating above the mold, and the embedded material can be supported and held while floating above the mold.

Next, embodiments of this invention will be illustrated below with reference to the drawings.

Figure 1 shows the concrete slab after construction, one of which is the holder for the embedded material according to this invention, and the concrete layer C poured on site.
The holder 1 and the embedding material A made of a lightweight solid material supported and held by the holder 1 are embedded therein together with necessary reinforcing bars 2 and 3. By supporting and holding the embedded material A with this holder 1, a concrete slab (the first (see figure). As the holder 1, a support leg 1 is partially fixed onto the formwork B for concrete pouring.
1, a groove-shaped short side mold piece 12 that supports and holds the short side of the embedding material A, and an L-shaped long side mold piece that supports and holds the long side of the embedding material A. 13 and a holding piece 14 that can sandwich and hold the embedding material A with the long-side mold piece 13 interposed after the embedding material A is set and prevent the embedding material A from floating. The supporting leg 11 is supported and held by floating at least the intersection part of the short side mold piece 12 and the long side mold piece 13 formed in a frame-like combination in the middle of the leg,
It is formed so that it can support and hold the embedded material A floating above the formwork B (see FIGS. 1 to 7). That is, as an example of how the holder 1 is used, the supporting leg 11 is partially fixed onto a suitably laid concrete pouring form B in a manner adapted to the dimensions of the embedded material A (see Fig. 6). Next, the short side mold piece 12 and the long side mold piece 13 are sequentially joined to the support leg 11 (see Fig. 7), and the embedding material A is attached to the support leg 11 and the mold pieces 12 and 13. The mounting work is carried out so that it is supported in a floating state with a spacing S on the formwork B, and after mounting, a part of the upper and lower surfaces and the side parts of the embedding material A are sandwiched between the holding pieces 14. When installed (see Figures 5 and 8), the embedded material A is firmly supported and held.

In addition, the embedded material A supported and held by the above-mentioned holder 1
For example, a foam molded product made entirely of synthetic resin, such as polystyrene foam, preferably a foam molded product with closed cells, or a cardboard, etc., is box-shaped, thick plate-shaped, or block-shaped. suitable.

In addition, as a modification of the holder 1, the supporting leg 1
By forming the holding piece 1 long and protruding the stabbing piece 11', the holding piece 14 can also be used as the support leg 11 (see Figs. 10 and 11).
(see figure), holding piece 1 corresponding to the width of embedding material A
4 (see FIG. 12) can also be used. or,
In either implementation, the parts other than the holding piece 14 may be assembled sequentially on site, or may be assembled in advance as a holder adapted to the dimensions of the embedded material A, and furthermore,
It is also possible to embed both or one of the short side mold piece 12 and the long side mold piece 13 of the holder 1 in the embedding material A (see FIGS. 14 and 15). On the other hand, the short side mold piece 12 and the long side mold piece 13
However, in addition to the illustrated groove shape or L shape, various shapes can be used. In addition, regardless of the type, the embedded material A may break even when an operator stands on the embedded material A and performs work such as reinforcing after installing the embedded material A in the holder 1. It is necessary to be able to install it in such a way that it will not fall or fall.

Before floating and supporting the embedded material A with the holder 1 as described above, the necessary lower reinforcement 2 is completed (see especially Fig. 6). Upper reinforcement arrangement 3 required after installation of
(see especially Figure 9), and after forming a state in which embedded material A has been placed and supported and reinforcement has been appropriately arranged, concrete C is poured, and the embedded material A is placed in concrete C.
(See Figure 1).

Note that the above-mentioned reinforcement arrangement is not limited to that shown in the drawings, and there are various reinforcement means, and instead of all or part of the reinforcement arrangement, a net-shaped reinforcing structure may be adopted.

Furthermore, the embedding material A can be arranged in two cases (see Fig. 8) and in a case in which a plurality of embedding materials A are arranged in a row in the longitudinal direction (see Fig.
(see figure), and since the contractor will often walk on it after installation, the embedded material A itself should have a wire mesh or other material inside to make it a more reinforced structure. In addition to using a reinforced structure in which the upper and lower layers are buried, or by bonding pressure-resistant plates such as plywood, vinyl chloride, or iron plates to at least one of the top and bottom surfaces to distribute the load, it is also possible to strengthen the upper and lower layers while keeping them integrated. Reinforcement can also be achieved by using non-foamed resin or low-foaming resin for the upper and lower layers as appropriate.

In any case, if the lightweight solid material forming the embedding material A is a synthetic resin foam molded product, it may be manufactured from polystyrene foam, polyethylene, polypropylene, polyvinyl chloride, or copolymers mainly composed of these. It is now possible to use foams made of foam, which can be implemented in a variety of shapes, such as those with a solid interior, as well as those with a solid interior to save materials and promote the flow of poured concrete. It is also possible to use a shape with a cutout a formed on the lower surface side and the side surface side, a shape with a part penetrated a′, and a shape with a sloped surface a″ formed on the lower surface or upper and lower surfaces (Figs. 16 to 19). reference).

Embedded material holder 1 based on the above idea
According to the above, a support leg 11 that can be partially fixed on the concrete pouring form B, a short side mold piece 12 that can support the short side of the embedded material A, and a long side mold piece 12 that can support the short side of the embedded material A. It consists of a long side mold piece 13 that can support the side side and a presser piece 14 that can sandwich and hold the embedding material A with the mold piece interposed and prevent the embedding material A from floating, and the above-mentioned The supporting leg 11 supports and holds at least the intersection part of the short side mold piece 12 and the long side mold piece 13 formed in combination in a frame shape by floating it in the middle of the leg, and lifting the embedded material A from above the mold frame B. Since it is formed so that it can be supported and held in a state where it is placed in the concrete, it is possible to easily support and hold the embedding material A made of lightweight solid material in a state where it is floating above the concrete pouring form B. The construction of the concrete slab, which is buried in the middle of layer C and surrounded by concrete, can be carried out very efficiently, and
The bearing is held firmly and the embedded material A does not move during concrete pouring.
This allows for reliable burial construction with good fixing properties. In addition, it is strong enough to withstand even if a worker stands on the embedded material A for reinforcement work, etc.
Reinforcement work can be done more efficiently.

Therefore, it is possible to provide a suitable holder for embedded material used in concrete slab construction, which can eliminate the drawbacks of the prior art as described above.

[Brief explanation of the drawing]

The figures illustrate embodiments of this invention; Fig. 1 is a sectional view of a concrete slab using a holder for embedded material according to this invention; Figs. 2 to 4 are perspective views of holder parts; FIG. 5 is a cross-sectional view of the parts shown in FIGS. 3 and 4, FIGS. 6 and 7 are perspective views showing the assembled state of the holder parts, and FIG.
9 and 9 are perspective views showing the construction process of the concrete slab, FIG. 10 is a perspective view showing an example of changing the retainer parts, and FIG. 11 is a sectional view using the parts shown in the previous figure.
Fig. 12 is a perspective view showing an example of a change in the holder parts, Fig. 13 is a perspective view showing an example of a change in placement of the embedding material, and Fig. 14 is a perspective view showing a change in the embedding material. A perspective view, FIG. 15 is a cross-sectional view of the previous figure, and FIGS. 16 to 19 are perspective views showing examples of changes to the embedding material. A...embedding material, 1...embedding material holder, 11...
...Supporting leg, 12... Short side mold piece, 13... Long side mold piece, 14... Holding piece, B... Formwork for concrete pouring, C... Concrete layer.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A holder for supporting and holding an embedded material in a suspended state above a formwork for concrete pouring, which is a support leg that can be partially fixed to the formwork for concrete pouring. , a short-side mold piece that can support the short side of the embedding material, a long-side mold piece that can support the long side of the embedding material, and a mold piece that holds the embedding material between them. The supporting legs are combined with a holding piece that can prevent the embedding material from floating up, and the supporting leg has at least the intersecting part of the short side mold piece and the long side mold piece formed in a frame-like combination in the middle of the leg. A holder for embedded material used in a concrete slab, characterized in that it is formed so as to be able to support and hold the embedded material in a floating state above the formwork. 2. A holder for embedding material used in a concrete slab according to claim 1 of the above-mentioned utility model registration claim, wherein the short side mold piece is a groove-shaped piece and the long side mold piece is an L-shaped piece.